Envelope



Sept. 8. 1925. 1,552,642 F. J. PARKS ENVELOPE 74 Filed oct. 12 1923 2Sheets-Sheet 1 Z 7 /NVENTO e-' I @[059/64 Jwms PAe/rs Sept. 8,- 1925.

1,552,642 F. J. PARKS ENVELOPE Fil Oct. 12,..1923 Mag ets-Sheet 2 i fedxI I L19 ATTO/P/VEK Patented Sept. 8, 1925.

PATENT OFFICE.

FREDERICK JAMES PARKS, F CLEVELAND, OHIO.

ENVELOPE.

Application filed October 12, 1923. Serial No. 868,200.

To all whom it may concern:

Be it known that I, FREDERICK J. PARKS, a citizen of the United States,resident of Cleveland, county of Cuyahoga, and State of Ohio, haveinvented new and useful Improvements in Envelopes, of which thefollowing is a specification, the principle of the invention beingherein explained and the best mode in which I have contemplated applyingthat principle, so as to distinguish it from other inventions.

My invention relates to envelopes and particularly to envelopes of theself-clasp type. One form of these envelopes is patented to me by U. S.Patent No. 1,459,414;

one type of machines for automatically manufacturing said self-claspenvelopes is illustrated in my U. S. Patent No. 1,316,737; and animproved process for manufacturing such envelopes having anautomatically and detachably interlocked retaining pocket and closureflap, is patented to me by U. S. Patent No. 1,459,415.

The particular improvements of this in vention reside in improved meansfor locking the inside ply of the pocket to the outside ply thereof, andfor locking the pocket as a whole to the envelope body. Furtherimprovements consist in'providing perfect closures at the corners of theenvelope.

The annexed drawings and the following description set forth in detailcertain means embodying my invention, such disclosed means constituting,however, but a few of the forms in which the principles of my inventionmay be embodied.

In said annexed drawings:

Figure 1 is a plan view of the blank from which one form of the improvedenvelopes is made;

Figure 2 is a view illustrating the state of the blank shown in Figure 1after the completion of the initial folding thereof;

Figure 3 is a view illustrating the form of said blank after thecompletion of the first step in the formation of the flap-receivingpocket;

Figure 4 is a view illustrating the form of said blank after thecompletion of the flapreceiving pocket, and the interlocking of theclosure flap therewith, the blank then being ready to receive the gum bymeans of which certain lateral tabs secure the two-ply body proper toclose the lateral edges of the envelope;

Figure 5 represents the blank shown in Figure 4 after applying the gumthereto;

Flgure 6 represents a view of the completed envelope;

Figure 7 represents a transverse sectional view, taken in the planeindicated by the lines VII-VII, Figure 6;

Figure 8 is a vlew of the blank from which another form of the improvedenvelopes is made;

Figure 9 is a view of said blank when it has been folded into thecondition illustrated by Figure 4 of the first-named blank;

Figure 10 is a view of the completed envelolge made from the blank shownin Figure Figure 11 is a plan View of the blank from which a second formof the improved envelopes is made;

Figure 12 is a view of said blank when it has been folded into thecondition illustrated by Figures 4 and 9 of the first two blanks,respectively; and

Figure 13 is a view of the completed envelopile made from the blankshown in Figure Referring to the annexed drawings in which the severalparts are indicated by the 2 integrally joined in a transverse plane 3,the joining edge 3 forming a parmanent closure along that edge of thecompleted envelope which shall serve as the bottom thereof. One of theplies 1 and 2, as for example the ply 1, is wider than the ply 2, due tointegral side flaps or extensions 4, extended along the oppositeparallel side edges, these side flaps 4 being adapted to be folded overbehind and sealed down upon the corresponding lateral edge portions ofthe rear ply 2 so as to afford permanent closures along the oppositelateral edges of the completed envelope. 7

Along the free end of one of the plies 1 and 2, these free ends beingadapted to form the mouth of the completed envelope, as, for example,the rear ply 2, is formed an integral outwardly extended two-sectionportion, viz, sections 5 and 6, which, in the tions 8' and 9 are foldedover, along the, transverse plane 12, upon the front face of.

.ford this pocket along and of the m .a. two-ply pocket, whose ends aresecured beneath the adjacent ends of the side flaps 4 so as toafparallel with the mouth-of the envelo e, open at its side oppositesaid mouth or t closure flap which has sections, 8 and 9 integrallyformed along the free'end of the;

front blank ply 1,the edge 10 ofthe pocket section 5, Figure 2, beingadapted to register. with the edgell of the flap sectlon 7, when.

the blank is given its initial foldin Thisinitial folding, as in factall the su quent f'oldings, is performed by machines of which one typeis illustrated by my Patentv No. 1,316, 37 and by a process patented tome b U. S. Patent No. 1,459,415. When the blan is given its second foldso as topresent the condition shown in Figure 3, the rear faces of thepocket sections 5 and 6 are brought together and at the same time theflap secthe ocketsection 6 and upon the rear of the lank portion 2. Whenthe blank is iven its third fold, so as to present the conition shown inFigures 4, 9 and 12, the ocket sections 5 and 6 are transversely oldedalong the rear of the lane line 10 to form a two-ply pocket, the apsection 7 being conjointly folded along the plane line.

11 and the flap section 8 being also conjointly folded along the planeline 13 so as to bring together t e rear faces of the flap sections 8and 9 in interlocked relationwit the two-ply pocket and intermediatesaid pocket and the rear of the blank portion ,2, the-extreme terminalfla portion 9 extending from said-pocket to orm a pull-out tab, asplainly shown in Figures 4, 9 and 12, the rear face of the flap section7 lying uppermost and, in conjunction with the flap section 8,completely surrounding the two-ply pocket, as also plainly shown in Fire 7..

It is evident that applying paste to t e lateral edges of the blank'ply2 and the ends ocket section 5, (Figures 4, 9 and 12), and then foldingthe lateral extensions 4 down upon said lateral edges of the rear blankportion 2 and the adjacent ends of the two-ply pocket will completeenvelopes,

such as shown in Figures 6, 10 and 13 which have been automaticallyformed and have a detachable interlocked pocket and closure fla for thepurpose of opening the envelope or the receptlon of any suitable filleror for postal inspection, etc. In fact, one type of such generalenvelope is patented tome by said U.- S. Patent No. 1,459,414. There arecertain-improvements,-

however, to such general type of envelope,

in the types of envelopes shown in this ap-.

plication and these improvements will now be described in detail.

com leted envelo are ada d to be folded dhe over the ther to E) e recetion of a Referrin I first to the type of envelope shown in igures 1 to7, it will be noted in F re 2 that certain lateral tabs 14am formeduponthe rear blank portion 2. The

purpose of these tabs 14 is to secure the twoply ocket to the body. ofthe envelope. It

will e noted that these tabs 14 are disposed 4 somewhat forwardly ofthe. plane line 10.

Consequently, when the {side flaps 4' are folded over from the positionshown in.Filgure 4 to the position shown in Figure 6, t e tabs 14 arefolded down upon the outer ply of'the two-ply pocket and upon the rearof the blank rear portion 2 so as securely to seal together said two-plypocket and the body of the envelope.

Referring to the type'of envelope shown-,1

in Figures 8, 9 and 10 the same includes, in

combination with the improvements of Figsures 1 to 7 means for insuringperfect closures at the corners of the envelope. These .means comprisesubstantially triangular extensions 16 and 19 formed, respective'l atthe extreme forwardends of the blank ack portion 2 and the extreme rear'ends of the closure section 7. The urpose of these 'extensions 16 and 19is tomsure envelope cor-.

ners so tight that the envelope may safely be used for shipping seedsand other small articles. These extensions 16 and 19", in the completedenvelope, assume the conditions shown in Figure 10 from which it 'willplainly be seen that imperforate corners for the purpose noted areformed.

After obtaining the folded condition of the envelope shown in Fi re 9,it is assumed that adhesive is app ied,'as shown in Figure 5, beforecompleting theenvelope. a 7

shown in Figure 10. In the form of envelo shown. in Figures 11, 12 and13, in a dition to the improvements described with reference to Fig-'ures 1 to 10 inclusive, I provide additional lateral tabs 15 upon therear blank portion 2. These lateral tabs 15 are formed on the terminaled es of-sai'd blank portion2 and no i are intende to provide means forsecuring together the two plies 5 and.6 of the two-plypocket. It will beevident from an-inspection of Figure 12 that these tabs 15 which are apart of-the pocket section 6, will,

tabs 14 are-folded down over the inner ends of the tabs 15 and overlapthe latter so thatthe tabs 14 are secured to the outer plyof These tabs15 are of a width mates the two-ply pocket. After obtaining the foldedcondition of the envelope shown in Figure 12, it is assumed thatadhesive is applied, as shown in Figure 5, before completing theenvelope shown in Figure 13.

It will be evident from an inspection of Figures 6, l0 and 13 that theflap sections 7, 8 and 9 of each of the three types of envel'opes shownand described are sotapered toward the free end of the blank port1on 1that, when the side flaps 4 are sealed over to form the lateral closuresfor the envelope, the sealed portions of said lateral flaps 4 do notextend inwardly as far as the adjacent portions of the flap portion 7Therefore, said flap portions 7 are not scaled down by the side flaps 4and are free to be opened, for the reception of the desired filler, forpostal inspection, etc., together with. the other flap sections 8 and 9,by a pull upon the terminal edge of said flap section 9.

What I claim is:

1. An envelope formed from a blank, said blank consisting of arectangular portion whose free end is to be double folded, side tabsformed on said portion adjacently forward of said free end, saidrectangular por tion being connected to a wider second portion havingside edges to, be creased and folded and whose free end is to be triplecreased and folded, said envelope having said two portions folded uponone another, a two-ply pocket flap formed on said first-named portion onthe free end thereof with the end ply facing inwardly to form a pocketadjacent the mouth of the envelope, said side tabs being bent inwardlyover said pocket flap and secured to the adjacent ends of said pocketflap and overlapping onto, and being secured to, the side edges of saidfirst-named portion, side flaps formed along opposite sides of saidsecondnamed portion and folded back and secured to the side edges of thesaid first-named portion, and a three-ply closure flap formed on thefree end of said second-named portion and folded over said pocket flapand detachably interlocked in double form in said pocket.

2. An envelope formed from a blank, said blank consisting of arectangular por tion whose free end is to be double folded, side tabsformed on said portion adj acently forward of said free end, saidrectangular I portion being connected to a wider second portion havingside edges to be creased and folded and whose free end is to be tri lecreased and folded, said envelope havlng said two portions folded uponone another, a two-ply pocket flap formed on said firstnamed portion onthe free end thereof with the end ply facing inwardly to form a pocketadjacent the mouth of the envelope, said side tabs being bent inwardlyover said pocket flap and secured to the adjacent ends of said pocketflap and overla ping onto, and being secured to, the side e ges of saidfirst-named portion, side flaps formed along opposite sides of saidsecond-named portion and folded back and secured to the 'side edges ofthe said first-n'amedportion and the corresponding edges of the saidpocket flap, said side flaps covering said side tabs, and a three-plyclosure flap formed on the free end of said second-named portion andfolded over said pocket flap and detachably interlocked in doubled formin said pocket.

3. An envelope formed from a blank, said blank consisting of arectangular portion whose free end is to be double folded, side tabsformed on the terminal portion of said free end, said rectangularportion being connected to a wider second portion having side edges tobe creased -and folded and whose free end is to be triple creased andfolded, said envelope having said two portions folded upon one another,a two-ply pocket flap formed on said first-named portlon on the free endthereof with the end ply facing inwardly to form a pocket ad acent themouth of the envelope, said side tabs being bent inwardly over the innerply of said pocket flap and secured thereto, side flaps formed alongopposite sides of said secondnamed portion and folded back and securedto the side edges of the said first-named portion and the correspondingedges of the said pocket flap, said side flaps covering said side tabs,and a three-ply closure flap formed on the free end of said second-namedportion and folded over said pocket flap and detachably interlocked indoubled form in said pocket.

4. An envelope formed from a blank, said blank consisting of arectangular portion whose free end is to be double folded, side tabsformed on said portion adjacently forward of said free end, other sidetabs formed on the terminal portion of said free end, said rectangularblank portion being connected to a wider second portion having sideedges to be creased and folded and whose free end is to be triplecreased and folded, said envelope having said two portion folded uponone another, a two-ply pocket flap formed on said first-named blankportion on the free end thereof with the end ply facing inwardly to forma pocket adjacent the mouth ofthe envelope, said two sets of side tabsbeing bent inwardly over the inner ply of said pocket flap, saidterminal tabs underlying said first-named tabs and overlapped by thelatter, said terminal tabs being secured to the inner ply of said pocketflap and said first-named tabs being secured to the adjacent ends of theinner ply of said pocket flap and overlapping onto, and being securedto, the side ed es of first-named blank portion, side flaps formed alongopposite sides of said second-named blank portion and folded back andsecured to the side edges of the'said first-named. 1 three-fold closureflapforme portion, and a on the end'o'f said second-namedblank portionand folded over said pocket flap and detachably. interlocked in'doubledform in said ket.

' An envelope formed from a blan ,said blank consisting of a rectangularportion.

, whose free end is to be double folded, side i tabs formed on saidportion adjacently for- -'10 ward ofsaid free'end, other side tabsformed onthe terminal portion of said, free. end, said rectangular blankportion being con-- ed upon one another, a two-1p formed on saidfirst-named b necte'd to a wider second portion having side edges to becreased and folded andwhose free end is to be triple'creased' andfolded, said envelope having said two y pocket flap ank portion on thefree end thereof with the end ply facing.

inwardly to'forma pocket ad acent the mouth ofthe envelope, said twosetsof side Y i tabs being bent inwardly overthe inner-'dply'" of saidpocket flap, said terminaltabs un er a a lying said first-named tabs andoverlapped and, said first-name closure fiapformed on the free endofsaidsecond-named blank portion and folded over said pocket flap and.detachably interlocked in doubled form in said pocket. a

- 6. An envelo e formed from a blank, said blank consistmg of arectangular ortion whose free end is to be double fol ed, side tabsformed on said portion adjacently v forward of said free end, saidrectangular portion being'connected to a wider secondportion having sideedges to be creased and folded and whose free endis to be'triple creasedand folded, said envelope having said two portions foldedupon oneanother, substantially triangular lateral extensions formed on saidrectangular blank' portion adjacent the edge by which-the same isconnected to said widerblank portion, a 'two-' ply pocket flap formed.on said first-named portion on the free end thereof with the end I plyfacing inwardly to form a pocket adjacent the mouth of the envelope,said side tabs being bent inwardly over said pocket flap and secured tothe adjacent ends of.

and folded back and secured to the si said pocket flap and overlappingonto, and

free being secured'to, the side edges of said firstnamed portion sideflaps formedalong opposite sides 0- said second-named ,(portion eedgesof the said first-named portion and the corres ondin'g edges of the saiddgo sai side aps covering said-si tabs, Sitld.

triangular extensions being turned inwardly 7 over said first-namedportion'and under said side flaps to formbottom leak-proof envel-.

ope corners, and a three-fold closure flap Y formed on the free end ofsaid second-named portion and folded over said pocket flap anddetachably'interlocked in doubled form in 'rtions fold said pocket.

7. .An envelope formed from'a blank, said blank consisting of .a'rectangular portion whose free end is to be double folded, side tabsformed on said ortion adjacently forward of said free en saidrectangularportion being connected to a wider's'econd portion havingside edges to be creased and folded and whose free end is to be triplecreased and folded, said envelope having said two portions folded uponone another, substantiallytriangular lateral extensions formed on saidrectangular blank portion adjacent the'edge by which the same isconnected to said wider blank ortion, lateral extensions formed on therec end of said second blank portion adjacent the edge by which saidfree end is connected to its body member, a two-ply pocket-flap formedon said first-named portion on the free-end form 'a pocket adjacent-themouth of the envelope, said side tabs being bent inwardly over saidpocket flap and secured to-the adjacent ends of said pocket flap andoverlapping .onto,' and being secured to, the side edges of saidfirst-named portion, side flaps .thereo'fwith the end ply facinginwardlyto formed along opposite sides of said secondnamed ortion andfolded back and secured to the side edges ofthe said first-named -portion and the'corresponding edges of the said pocket flap, said sidefiapscovering said side tabs, said triangular extensions being'turnedinwardly over said first-named portion and under said side flaps toform-bottom leakproof envelope corners, said second-named .lateralextensions being turned inwardly under the forward end of said sideflaps to form top leak-proof envelope corners, and a three-fold closureflap formed on the free end'of said second-named portion and fold t edover said pocket flap and detachably interlocked in double form in saidpocket.

Signed by me this 18" day of September,

' FREDERICK JAMES PARKS.

